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Is there any possibility to add a clock to be shown in each slide using beamer?

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What kind of clock? Just any clock? The current time? Should it tick on a current slide? –  Werner Nov 18 '13 at 20:03
    
@Werner, I need to count the time of my presentation. –  phdstudent Nov 18 '13 at 20:05
    
@phdstudent: Why not just use a stopwatch? The PDF file format is fixed, so if you want a dynamic counter to keep track of it, it has to use Java (supported by certain PDF viewers). Also, what good would a counter be for the viewer? Instead you can use a beamer progress bar. It's far more useful to the viewer that a clock. –  Werner Nov 18 '13 at 20:07
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There are also some nice visual counters Visual counter for LaTeX? –  Claudio Fiandrino Nov 18 '13 at 20:13
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You can use impressive. It has a clock with t shortcut. impressive.sourceforge.net –  Harish Kumar Nov 18 '13 at 23:07
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2 Answers

impressive offers, among lot of other features, a clock that shows the time elapsed on the right upper corner. The clock is visible to audience also. The clock can be made visible/invisible by the short cut key t . For details of other features and short cuts refer to the impressive documentation (impressive.html, found in the same folder).

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There is a package called tdclock. However, to make it useable it must be patched. See http://tex.stackexchange.com/a/148464

\documentclass{beamer}
\usepackage[font=Helv,timeinterval=60]{tdclock}

\setbeamertemplate{headline}{\initclock\tiny{\tdyear-\tdmonth-\tdday\quad\tdhours:\tdminutes}}

\begin{document}
\begin{frame}{Frame title}
\dots
\end{frame}
\end{document}
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